Wrench.



No. 799,917. PATENTED SEPT. 19, 1905. 11. 11. MILLER.

WRENCH.

APPLICATION FILED MAY 27. 1905.

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UNITED STATES PATENT oEEIoE.

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed May 27. 1905. Serial No. 262,586.

To all whom, it may concern:

Be it known that I, ROBERT N. MILLER,a citizen of the United States of America, residing at Pittsburg, in the county of Alleghenyand State of Pennsylvania, have invented certain new and useful Improvements in Wrenches, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in wrenches, and more parti'cularly to that type of wrench commonly known as a monkey-wrench.

My invention aims to .provide a wrench of the above character with which a finer and more accurate adjustmentu can be obtained than in wrenches of this type heretofore constructed.

In connection with my improved wrench I have devised positive and reliable means for easily and quickly adjusting the movable jaw of the wrench to grip or embrace an object and also have devised novel means for further or more minutely adjusting" the jaw to grip Said object.

With these and many other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts, which will be more fully described, illustrated, and claimed hereinafter.

The essential features of the present invention involved in carrying out the objects above specified (representing an improvement over my application for wrench filed April 30, 1904, and patented February 7, 1905, No. 781,963, whichis wholly generic in the present case) are necessarily susceptible to structural change without departing from the scope of the invention. The preferred embodiments are shown in the accompanying drawings, in

which- Figure 1 is a side elevation of my improved wrench. Fig. 2 is an edge view of my improved wrench, a portion of the shank and handle thereof being broken away. Fig. 3 is a side elevation of a portion of the shank and fixed jaw of my improved wrench, illustrating the movable jaw thereof in vertical section. Fig. 4 is a view of the opposite edge of my improved wrench from that illustrated in Fig. 2. Fig. 5 is a sectional View taken on the line a a of Fig. 1. Fig. 6 is a similar view taken Fig. 7 is a detail perspective view of a portion of the movable jaw. Fig. 8 is a perspective view of a yoke employed in connection with the movable jaw. Fig. 9. is a perspective view of a locking-block employed in connection with the movable jaw of my improved wrench, and Fig. 10 is a detail sectional view of a portion of the movable jaw of my improved wrench.

a wrench similar in some respects to the wrench illustrated and described in my prior applicawith the advantageous features and novel conmy improved wrench a brief description of the same is herein set forth.

parts, it will be observed that I employ a of handle 4: upon its lower end.

which is adapted to slide upon the shank 1, comprises two sections 6 and 7, the section 6 end of a knurl 10, that is revolubly mounted tion 7 of the movable jaw. The knurl 10 is through an aperture 1 1, formed in said lug, and is retained therein by a key 15, which passes through the lower end of the pin 12 and locks the knurl 10 upon said extending lug. The jaw-section 6 of the wrench is provided with an aperture 16, through which the shank 1 of the wrench is adapted to pass, the rear wall and the sides of the jaw-section being cut away, as designated at 17, forming two yokes 18 18, which embrace and guide the shank 1 of the wrench.

It will be observed that the section 7 of the movable jaw is connected to the section 6 thereof by'the screw 9. Consequently the section 6 can be moved relatively to the jawsection 7. In order to lock the jaw-section 7 this section of the jaw with a recess 19, in which is mounted a locking-block 20, having a serrated or toothed face 21, adapted to engage the serrated or toothed edge 2 of the shank 1. In my prior application this looking-blockwas actuated by a spring-retained In the present application I have illustrated.

tion; but in order that those not conversant struction of the same may fully understand:

Referring to the drawings, wherein like nu-. merals of reference designate corresponding shank 1, having a serrated or toothed edge 2, and said shank carries an integral or fixed aw 3 upon its upper end and a conventional form.

The movable jaw 5 of my improved wrench, 18

being provided with a screw-threaded vertically-disposed aperture 8, in which is .revolubly mounted a screw 9, carried upon one upon an extending lug 11, carried by the secretained in engagement with the section 7 of the jaw by a depending pin 12, which passes upon the shank 1 of the wrench, I provide 1 pin adapted to be pulled or forced outwardly by the operator of the wrench in order that the movable jaw may be moved upon the shank.

In the present application my invention resides in the provision of novel means for reversely operating the wrench. These means consist of employing a yoke or strap 22, having side arms 23 28, which are adapted to lie in grooves 24, formed in the sides of the jawsection 7. The ends of the arms 23 23 are provided with pierced cross pieces 25 25, which are secured by suitable screws 26 26 to the sides of the locking-block 20, said locking-block being provided with suitable screwthreaded apertures 27 27 to accommodate said screws. The curved portion 28 of the strap or yoke is adapted to embrace the extending lug 14 of the jaw-section 7, as clearly illustrated in Figs. 3 and 6 of the drawings. To retain the locking-block in engagement with the serrated edge 2 of the shank 1, I employ a spring 29, which is adapted to engage over a lug 30, carried by the rear face of the locking-block, and to retain said spring Within the section 7 I employ a screw 31, which is clearly illustrated in Fig. of the drawings.

To operate my improved wrench, it is only necessary to press upon the curved portion 28 of the yoke, which will release the lockingblock from engagement with the serrated edge 2 of the shank 1. The movement of the locking-block is limited by the compression of the spring 29, also by the curved portion 28 of the yoke engaging the extending, lug 1 1 of the jaw-section 7. Upon the release of the curved portion 28 of the yoke the spring 29 returns the locking-block to its normal position in engagement with the shank of the Wrench.

By the construction of my improved Wrench it will be seen that the movable jaw thereof can be quickly adjusted to an object and then more 'accurately adjusted after the movable jaw has been placed in position against an object. This feature of my improved wrench prevents the wrench from slipping from the object, which in some instances injures the object and the party manipulating thewrench.

It is thought from the foregoing that the construction, operation, and advantages of the herein described wrench will be apparent without further description, and it will be understood that various changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit of the invention or sacrificing any of the advantages thereof.

WV hat I claim, and desire to secure by Letters Patent, is

In a wrench, the combination with a toothed shank having a fixed jaw, of a movable jaw sliding on said shank. said movable jaw being composed of two sections, each embracing the shank, the lower section of said movable jaw being formed with an extending lug, a knurled nut mounted on said lug, a screw formed integral with said knurled nut and screwed into one of the sections, said nut and screw being movably mounted in the other of the sections by a pin carried by said nut, a key passing through the pin carried by said nut, a springpressed toothed block arranged in a recess in the section in which the screw is mounted and on the opposite side from-said screw, a yoke connected to said block and embracing said lug and the sides of said last-named section, substantially as described.

In testimony whereof I aflix my signature in the presence of two witnesses.

ROBERT N. MILLER.

Witnesses:

E. E. POTTER, K. H. BUTLER. 

